viewport on show-most-popped line 1592

(I put all this in the css as comments)
When FitVidsJS comes aboard, we're gonna want to change the height
because the aspect will shore itself up.

16:9 will put it the video at about 490px high, so it'll need to be
want it at 310px.

In the media queries at the bottom, it'll want to change it for medium
desktop, too.